A brief look at key executives at Krafton, the maker of PUBG, including founder and chairman Chang Byung-gyu and Brendan Greene, aka “PlayerUnknown” (Kim Jaewon/Nikkei Asia)

A brief look at key executives at Krafton, the maker of PUBG, including founder and chairman Chang Byung-gyu and Brendan Greene, aka "PlayerUnknown" (Kim Jaewon/Nikkei Asia)